Mestrado em Ciências Florestais
URI Permanente para esta coleção
Nível: Mestrado Acadêmico
Ano de início: 2008
Conceito atual na CAPES: 4
Ato normativo: Ofício N. 39-12/2007/CTC/CCA/CAPES de 31/07/2007 Homologado pelo CNE (Portaria Nº 656 de 22/05/2017) Publicação DOU em 27/07/2017, Seç. 1, Pag. 36.
Periodicidade de seleção: Semestral
Área(s) de concentração: Ciências Florestais
Url do curso: https://cienciasflorestais.ufes.br/pt-br/pos-graduacao/PPGCFL/detalhes-do-curso?id=1424
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Submissões Recentes
- ItemUso de imagens termais no monitoramento de condutância estomática, potencial hídrico foliar e disponibilidade de água no solo em mudas de eucalipto(Universidade Federal do Espírito Santo, 2025-02-26) Oliveira, Lorena Lacerda de; Santos, Aline Ramalho dos; https://orcid.org/0000-0002-1560-3555; http://lattes.cnpq.br/6556857615537768; Pezzopane, José Eduardo Macedo; https://orcid.org/0000-0003-0024-4016; http://lattes.cnpq.br/3640768649683482; https://orcid.org/0009-0007-9580-0850; http://lattes.cnpq.br/2442956619920771; Cairo, Paulo Araquém Ramos ; https://orcid.org/0000-0002-3619-7867; http://lattes.cnpq.br/2680188874788812; Toledo, João Vitor ; https://orcid.org/0000-0002-9712-4776; http://lattes.cnpq.br/6698808632715962Eucalyptus, widely cultivated in Brazil and globally to meet the demand of the pulp and paper industry, has been planted in regions with varying soil and climatic conditions. In areas with low and irregular rainfall, water scarcity may lead to stomatal closure, adversely affecting transpiration, gas exchange, photosynthesis, and consequently, plant development. The use of innovative technologies, such as thermographic imaging, has proven to be a promising tool for monitoring plant water stress. This study aimed to evaluate the potential use of thermographic images of eucalyptus leaves in determining stomatal conductance, leaf water potential, and soil water content under different atmospheric demand and soil water availability conditions.The experiment was conducted in an open area at the Laboratory of Meteorology and Forest Ecophysiology, Federal University of Espírito Santo, located in Jerônimo Monteiro, Espírito Santo, Brazil. Three field campaigns were carried out in April, May, and August 2024, with the aim of collecting data under varying atmospheric conditions, particularly solar radiation, temperature, and atmospheric vapor pressure deficit. Seedlings of the hybrid Eucalyptus urophylla × Eucalyptus grandis clone I144 were planted in 12-liter pots and grown for approximately 30 days, with irrigation initially maintained near 90% of the maximum soil water retention capacity (MWRC). During each campaign, once the plants reached approximately 0.5 m² of leaf area, irrigation was suspended for a subset of plants, and the following water supply levels were implemented: full irrigation, moderate water restriction, and severe water restriction. These levels were defined by maintaining the substrate at 90%, 60%, and 30% of the MWRC, respectively. Five replicates were adopted, totaling 15 plants per campaign. On the final day of each campaign, water consumption, gas exchange, stomatal conductance, leaf water potential, and leaf temperature were measured to characterize plant physiological responses. Additionally, throughout the campaigns, daily measurements were taken at 10 a.m. for soil water content, stomatal conductance, and leaf temperature, while predawn leaf water potential was measured to model the physiological variables and soil water content as a function of leaf temperature and the temperature difference between air and leaf . Data were subjected to analysis of variance, and when significant differences were found using the F-test at the 5% level, means were compared using Tukey's test at the same significance level. For modeling purposes, second-order polynomial models were fitted to describe the relationships among variables, and two regression algorithms were employed: Random Forest Regressor (RFR) and K-Nearest Neighbors Regressor (KNN). Model accuracy was assessed using the coefficient of determination (R²), standard error of estimate (SEE), and root mean square error (RMSE). The results demonstrated a significant impact of water restriction on the ecophysiology of eucalyptus by the end of the campaigns, with stomatal closure emerging as the primary control mechanism. Furthermore, thermographic imaging proved useful in determining leaf water potential, soil moisture content, and particularly stomatal conductance, highlighting its applicability in assessing plant water status
- ItemEfeitos da adição de lã de vidro à resina ureia-formaldeído nas propriedades de painel aglomerado homogêneo(Universidade Federal do Espírito Santo, 2025-04-15) Fassarella, Michelângelo Vargas; Chaves, Izabella Luzia Silva; https://orcid.org/0000-0002-3808-0136; http://lattes.cnpq.br/1057676508843699; Gonçalves, Fabrício Gomes; https://orcid.org/0000-0003-2010-9508; http://lattes.cnpq.br/0616694853822879; https://orcid.org/0000-0003-4495-6058; http://lattes.cnpq.br/4157179239531243; Lelis, Roberto Carlos Costa; https://orcid.org/0000-0003-2923-3839; http://lattes.cnpq.br/5175502780570226; Paes, Juarez Benigno ; https://orcid.org/0000-0003-4776-4246; http://lattes.cnpq.br/3454401627877927The improper disposal of glass wool waste poses an environmental challenge, where its utilization in materials engineering represents a sustainable strategy to mitigate impacts and enhance the performance of composites. This research examined the incorporation of glass wool (GW) waste as a filling material in urea formaldehyde (UF), assessing its effects on the properties of the adhesive and its influence on the physical-mechanical, fireproof, and acoustic properties of engineered wood panels. Panels with a target density of 700 kg.m-3 were produced using different proportions of glass wool in the adhesive (T1: 0%; T2: 3.34%; T3: 4.93%; T4: 6.52%; T5: 9.49%; T6: 12.35%). Manufactured in a hydraulic press at 160 ºC with a compression force of 72 tons and a pressing duration of 10 minutes, a ratio of 12% adhesive was maintained concerning the dry mass of the wood particles. Auxiliary analyses, such as the characterization of the filling material, included X-ray diffraction, thermogravimetry, and infrared spectroscopy, while the panels underwent densitometric profile analysis and scanning electron microscopy. The statistical analysis involved regression, variance analysis, and the Scott-Knott test (p < 0.05). Hierarchical clustering, principal component analysis, and Pearson correlations allowed for the identification of factors and verification of the strength of associations among the parameters. The results indicated that the addition of 3.39% of GW to the adhesive improved dimensional stability, the modulus of rupture, internal bonding, and screw withdrawal of the panels. In contrast, higher contents increased the damping factor and fire resistance. These findings highlight the potential of glass wool as a functional additive, promoting the development of safer and more sustainable composites
- ItemPotencial da regeneração natural como estratégia para restauração ecológica da Mata Atlântica no Espírito Santo(Universidade Federal do Espírito Santo, 2025-04-14) Angelo, Mônica Pagio de; Dan, Maurício Lima; https://orcid.org/0000-0002-1483-081X; http://lattes.cnpq.br/4634459670843421; Kunz, Sustanis Horn; https://orcid.org/0000-0001-6937-7787; http://lattes.cnpq.br/0203797981088640; https://orcid.org/0009-0006-8815-3176; http://lattes.cnpq.br/6731030166565223; Dias, Patricia Borges; https://orcid.org/0000-0002-5227-8341; http://lattes.cnpq.br/1194831380343570; Sapdeto, Cristiani; https://orcid.org/0000-0002-9285-6636; http://lattes.cnpq.br/Successive land-use cycles in tropical regions, driven by agricultural and logging activities, have led to the fragmentation and loss of native forest cover, threatening biodiversity and ecosystem services. In this context, natural regeneration emerges as a potentially viable strategy for ecological restoration, particularly in areas with forest remnants and seed dispersing fauna. This study aimed to investigate the potential of natural regeneration in areas with different abandonment ages in southern Espírito Santo, Brazil, to inform ecological restoration efforts. Four areas representing different successional stages were assessed: mature forest (MM), tall secondary forest (CA), low secondary forest (CB), and degraded pasture (PS). In each area, five plots measuring 4 m × 8 m (160 m² per area) were established, and all individuals with a minimum height of 60 cm and a diameter of at least 2.0 cm at ground level were inventoried. Structural parameters (density and dominance), diversity metrics (Shannon index [H’] and Pielou’s evenness), and floristic similarity (Jaccard index, Venn diagram, non-metric, multidimensional scaling [NMDS], and Morisita-Horn overlap index) were calculated. A total of 526 individuals were recorded, distributed across 33 families, 72 genera, and 118 species, with Sapotaceae, Fabaceae, and Myrtaceae being the most represented families. The abundance of individuals did not differ significantly (p < 0.05) among MM (155), CA (153), and CB (132), but PS showed significantly lower values (86). The diversity of CA (H’ = 3.43) was comparable to MM (H’ = 3.14), both higher than those observed in CB (H’ = 1.51) and PS (H’ = 0.75). The most abundant species were Dalbergia nigra (Vell.) Allemão ex Benth., Actinostemon klotzschii (Didr.) Pax, and Varronia curassavica Jacq. According to the IUCN, D. nigra is classified as vulnerable and Couratari asterotricha Prance as endangered. MM and CA showed a predominance of zoochoric species, indicating progression toward later successional stages through natural regeneration. In contrast, CB and PS were dominated by pioneer species and exhibited low diversity. Floristic similarity between areas was low a common pattern in tropical forests likely influenced by historical land use, which plays a significant role in shaping forest regeneration dynamics. MM stood out for its advanced successional stage, moderate diversity, and presence of indicator species associated with mature ecosystems, such as those from Lauraceae, Myrtaceae, and Sapotaceae, serving as a reference point for restoration actions. Although still recovering, CA shared several features with MM, such as high Shannon diversity and a dominance of zoochoric dispersal, suggesting consistent successional advancement. Meanwhile, CB and PS, representing early successional stages, were characterized by a prevalence of pioneer species and low functional diversity. The high floristic dissimilarity among areas highlights the influence of multiple ecological and environmental factors, underscoring the importance of site-specific management approaches. Strategies such as enrichment planting with zoochoric species and the control of invasive grasses may accelerate ecological succession, enhancing connectivity and structural complexity. In conclusion, natural regeneration holds potential for ecological restoration, particularly in less degraded areas like CA, whereas CB and PS require adaptive management to overcome limitations in diversity and functional recovery
- ItemEfeito de diferentes métodos de saturação na perda de massa e na cor de cavacos de madeira de Eucalyptus spp(Universidade Federal do Espírito Santo, 2025-02-27) Lima, Saulo José da Costa; Dambroz, Graziela Baptista Vidaurre; https://orcid.org/0000-0001-9285-7105; http://lattes.cnpq.br/2988548512574129; Batista, Djeison Cesar; https://orcid.org/0000-0003-4427-2457; http://lattes.cnpq.br/2211842232280717; http://lattes.cnpq.br/1086495700814670; http://lattes.cnpq.br/1086495700814670; Longue Júnior, Dalton; https://orcid.org/0000-0002-5149-3074; http://lattes.cnpq.br/7147667616879582; Castor Neto, Thayanne Caroline; https://orcid.org/0000-0002-9740-1665; http://lattes.cnpq.br/6667969524192169The aim of this study was to evaluate the effect of three different saturation methods on the mass loss and color of Eucalyptus spp. wood chips. We tested chips from clones of three species (E. grandis, E. urophylla and E. grandis × urophylla) with pre-established levels of basic density (“low”, “medium” and “high”). The Control saturation method (M1) consisted of that proposed by the standard NBR 11941 (application of only vacuum during the saturation process), and the others (M2 and M3) were adaptations of the standard, in which pressure and temperature (70 °C and 100 °C) were applied, in addition to vacuum. The analyses of the chips included mass loss, colorimetry (CIELab color space), solubility in cold water, and two ways of calculating basic density (methods of the hydrostatic balance - MBH and the maximum moisture content - MMTU). Except for E. grandis, the saturation methods caused significant mass losses in the chips, with percentages of up to 2.37%, especially for M3. The chips darkened and the color change caused by saturation was classified as “large” and “very large”, evidencing significant changes in the tone of the wood. However, the saturation methods did not interfere in the determination of the basic density of the chips, regardless of the calculation method used (MBH and MMTU); that is, the mass/volume ratio of the wood was not modified by the mass loss, and the density calculation methods did not differ from each other. In addition, the time required for chip saturation was reduced by up to five days (M3).
- ItemConversão termoquímica de resíduos de bagaço de cana-de-açúcar e de ossos bovinos em biocarvões para uso na retenção de terbuthylazine do solo(Universidade Federal do Espírito Santo, 2025-02-27) Carvalho, Fernanda Aparecida Nazário de; Mendes, Kassio Ferreira ; https://orcid.org/0000-0002-2869-8434; http://lattes.cnpq.br/7101423608732888; Dias Júnior, Ananias Francisco ; https://orcid.org/0000-0001-9974-0567; http://lattes.cnpq.br/2428652077952117; https://orcid.org/0000-0003-0338-9501; http://lattes.cnpq.br/9149257142112493; Sousa, Rodrigo Nogueira de ; https://orcid.org/0000-0003-3872-5480; http://lattes.cnpq.br/1074112643914964; Souza, Elias Costa de ; https://orcid.org/0000-0001-9514-635X; http://lattes.cnpq.br/2443233154986868; Silva, Álison Moreira da ; https://orcid.org/0000-0003-3671-928X; http://lattes.cnpq.br/9748209517542126Resumo